ui: animate fab position in tunnel deletion flow

When tunnel deletion is triggered we don't bother with animation theatrics
because the resulting Snackbar needs this fab to be its anchor, which it can't
do if its outside the screen or busy animating.

Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>

1 files changed, 19 insertions, 0 deletions

diff --git a/ui/src/main/java/com/wireguard/android/fragment/TunnelListFragment.kt b/ui/src/main/java/com/wireguard/android/fragment/TunnelListFragment.kt
index f19c7c2c..a4980779 100644
--- a/ui/src/main/java/com/wireguard/android/fragment/TunnelListFragment.kt
+++ b/ui/src/main/java/com/wireguard/android/fragment/TunnelListFragment.kt
@@ -4,6 +4,7 @@
  */
 package com.wireguard.android.fragment
 
+import android.animation.ObjectAnimator
 import android.annotation.SuppressLint
 import android.app.Activity
 import android.content.Intent
@@ -305,6 +306,7 @@ class TunnelListFragment : BaseFragment() {
     private inner class ActionModeListener : ActionMode.Callback {
         val checkedItems: MutableCollection<Int> = HashSet()
         private var resources: Resources? = null
+        private var initialFabTranslation = 0f
 
         fun getCheckedItems(): ArrayList<Int> {
             return ArrayList(checkedItems)
@@ -314,6 +316,7 @@ class TunnelListFragment : BaseFragment() {
             return when (item.itemId) {
                 R.id.menu_action_delete -> {
                     val copyCheckedItems = HashSet(checkedItems)
+                    binding?.createFab?.translationY = initialFabTranslation
                     Application.getTunnelManager().tunnels.thenAccept { tunnels ->
                         val tunnelsToDelete = ArrayList<ObservableTunnel>()
                         for (position in copyCheckedItems) tunnelsToDelete.add(tunnels[position])
@@ -343,6 +346,13 @@ class TunnelListFragment : BaseFragment() {
             if (activity != null) {
                 resources = activity!!.resources
             }
+            binding?.createFab?.let {
+                initialFabTranslation = it.translationY
+                ObjectAnimator.ofFloat(it, View.TRANSLATION_Y, 400f).apply {
+                    duration = 400
+                    start()
+                }
+            }
             mode.menuInflater.inflate(R.menu.tunnel_list_action_mode, menu)
             binding?.tunnelList?.adapter?.notifyDataSetChanged()
             return true
@@ -351,6 +361,15 @@ class TunnelListFragment : BaseFragment() {
         override fun onDestroyActionMode(mode: ActionMode) {
             actionMode = null
             resources = null
+            binding?.createFab?.let {
+                if (it.translationY != initialFabTranslation) {
+                    ObjectAnimator.ofFloat(it, View.TRANSLATION_Y, initialFabTranslation).apply {
+                        duration = 400
+                        start()
+                    }
+                }
+            }
+
             checkedItems.clear()
             binding!!.tunnelList.adapter!!.notifyDataSetChanged()
         }